Lamp attachment.



Patented Feb. 207 |900.

D. N Aw. L EH GM DT ....T HA .P ,WM .A FL 7. 9 8, 3 4 6 0. H

(Application led Oct. 23, 1899.)

(No Modal.)

UNITED STATES PATENT OFFICE.

FREDERICK W. I'IEDGELAND, OF CHICAGO, ILLINOIS.

LAM P ATTACHM ENT.

SPECIFICATION forming part of Letters Patent N 0. 643,897, dated February 20, 1900.

Application led October 23, 1899. Serial No. 734,508. (No model.)

To 1r/ZZ whom itV may concern.-

Be it known that I, FREDERICK W. HEDGE- LAND, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Lamp Attachments; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to an improvement for securing a lamp in the ordinary lantern or hood commonly used on carriages and other vehicles. Under the ordinary arrangement the lamp or candle holder has a threaded engagement with the lantern, which is provided with a throat-aperture in the bottom threaded either exteriorly or interiorly. The throataperture or threaded parts are often of dierent diameters in dierent forms of lanterns, so that in using a new style of lamp the same dierence would have to be provided for, making it both inconvenient and more expensive.

The object, therefore, of this invention is` to provide a means in the form of an expansible-joint connection for securing a lamp in any of the ordinary forms of lanterns already in use, no matter what the diameter of the throat-aperture may be, and also to dispense with the necessity of providing new lanterns with threaded engaging surfaces.

In the accompanying drawings, Figure lis an elevation of a lantern and lamp embodying the improved features. Fig. 2 is a brokenaway Vertical section. Fig. 3 is a plan section on line 3, Fig. 2, looking in the direction' indicated by the arrow. Fig. 4 is a broken- .away perspective, some of the parts being removed. Fig. 5 is a View in perspective of an expanding-plug. Fig. 6 is a perspective of the expanding segments; and Fig. 7 is a detail in perspective of one of the expanding segments, looking at the inner side.

A represents the ordinary lantern-body commonly used and which is provided in the bottom with a throat-aperture B. This aperture is threaded,as at a, for the engagement of the correspondingly-threaded part of the lamp or candle holder used.

The lamp-body C illustrated is of the new type of acetylene-gas lamps, and their application for use in connection with the already-attached lanterns of carriages and similar vehicles brought out the necessity of the present invention, which permits of a lamp being secured in either a threaded or smooth surface of the apertured throat and of different diameters.l

A cap or disk D is rigidly secured to the top of the lamp. A sleeve o forms an integral part of the cap D and extends upwardly therefrom, as shown in Figs. 3 and 4. This sleeve is provided exteriorly with the threaded surface a2 and loosely incloses the gas or burner tube a3, which extends down into the gasgenerating chamber of the lamp through the cap D.

Aplug E, Fig. 5, is provided longitudinally with a threaded aperture a4 and engages with the correspondingly-threaded sleeve a'. This plug has four equal sides Z), which gradually taper or slope from the top to the lower end and provide for an expansible wedging action.

An expansible socket is composed of a num; ber of segmental sections F, Figs. 2, 3, 6, and 7, the inner sides of which are beveled, as at b', from the lower end to the top. These sections are retained loosely in place by an inclosing elastic band G, which may be of rubber or any other material suitable for the purpose that will provide for expansion and contraction in accordance with the direction in which the plug Eis moved on its threaded sleeve. When in the working position, (shown in Figs. l, 2, and 3,) the sloping sides of the expanding-plug have frictional contact with the adjacent beveled surfaces of the segmental sections F. b2 represents spaces between the adjacent edges of these sections when expanded.v

In operation the rubber band should be clasped in oneihand and the lamp turned with the other, which will have the eect of moving the plug upwardly or downwardly in accordance with the direction in which the lamp-body is turned and expanding or contracting the joint-connection parts accordingly. To place the lamp in the lantern, the parts should be expanded to nearly the diameter of the throataperture in the bottom of the lantern, then insert the upper end, as shown by the brokenaway parts in Fig. l, then force the rubber band against the wall on one side by pressing on the lamp near the top with one hand IOO as the lamp is turned with the other to draw the plug downwardly and expand the segmental sections and lock the lamp firmly in place by frictional contact.

The bottom Cl ot the lamp unscrews, which provides for the removal of the exhausted carbid and renewal of the charge, so that the upper portion of the lamp need not ordinarily be removed from the lantern part.

Having thus described my invention, what I claim as ne\v,'and desire to secure byLetters Patent, is-

l. A lamp attachment, comprising an eX- pansible socket, composed of a number of segmental sections, and means for expanding said socket-sections to engage the nclosing walls of an aperture in supporting an object by frictional contact, substantially as described.

2. A lamp attachment, comprising an expansible socket-joint, composed of a number of segmental sections, an expanding-plug, inclosed by said sections, and means for loosely retaining the said sections in position to be operated upon by the expanding-plug, substantially as described.

In a lamp attachment, the combination with an expansible socket-joint, consislingot` expanding-plug having sloping sides and a threaded engagement with said sleeve,a number of segmental sections, having their inner faces beveled and loosely surrounding said plug, and means for retaining said sections in position to be spread by the expandingplug, substantially as described.

In testimony whereof I affix my signature in presence ot two witnesses,

FREDERICK lV. HEDGELANI).

Witnesses:

L. M. FREEMAN, L. B. COUPLAND. 

